Diego Costa regrets the manner of his Chelsea exit and admits to having “special affection” for people at the club. Costa finally agreed a move back to Atletico Madrid earlier this week and arrived in the Spanish capital on Friday, ending weeks of exile in Brazil.The Spain striker won two Premier League titles in his three seasons at Stamford Bridge, but his stay ended in acrimony as he refused to return to the club after being informed by text message that he was not in Antonio Conte’s plans.